PROJECTS IN FARM MACHINERY REPAIR 315 



all clips by tapping each with hammer until it begins to 

 tighten ; then loosen it, and begin on the next. When all 

 are adjusted, tighten them. 



4) Putting on New Guards Bolt new guards in place 

 where old ones are damaged. If the new guard brings 

 the ledger plate too high, remedy this by putting pieces 

 of tin between the guard and the bar. 



5) Shoes Examine both the outside and inside ..shoes on 

 cutter bar. If parts are badly worn, replace them. See 

 that they are adjusted for proper height. 



6) Knife Sections Broken or badly-worn knife sections can 

 be easily removed by placing the vertical edge of bar on 

 an anvil or heavy piece of iron, with a square, straight 

 corner. Strike the back of the section with a hammer, 

 making it cut the rivet off. Use soft steel rivets of proper 

 size for putting on new sections. Test the knife to see 

 that sections center properly. The sections are properly 

 centered if each is directly under a guard when the pit- 

 man is at either end of its stroke. Examine to see if a 

 centering device is provided on machine. When steel 

 pitmans are used, they are usually made adjustable for 

 length. This makes centering easy. 



7) Pitman Adjust both the knife head and wrist pin bear- 

 ing to secure the least amount of lost motion. 



8) Gears If badly worn, make adjustment so they will work 

 properly where possible. If gears are badly worn, replace 

 with new ones. 



9) Bearings Examine all beariifgs for wear. Free them of 

 all grit, dirt and vegetable matter. Lubricate all parts 

 with new oil. 



